CAREER: Measurement and Analysis of Particle/Turbulence Interaction within Two-Phase Flows

职业：两相流内颗粒/湍流相互作用的测量和分析

• 批准号: 9702723
• 负责人: Kenneth Kiger
• 金额: $ 23.3万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-01 至 2001-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9702723&HistoricalAwards=false
• 关键词: CAREER; Measurement; Analysis; Particle; Turbulence

ABSTRACT CTS-9702723 Kenneth T. Kiger University of Maryland The research objective is to advance the state of knowledge concerning particle-turbulence interaction in dilute, disperse, two-phase flows, through progress in understanding how mass, momentum and energy is exchanged in dispersed systems by detail experimentation, analysis, and simulation. New instrumentation which will enable the simultaneous measurement of particle concentration, particle velocity and fluid velocity within a three-dimensional volume will be developed. A scanning particle image velocimeter will be constructed using a high-speed copper-vapor laser, scanning optics, and a drum camera to measure two velocity components of both phases and the particulate concentration on multiple planes within the measurement volume. The measurements will provide detailed information about the organization of particulates in relation to the turbulent fluid structure, as characterized by cross-correlations of the particle and fluid velocity and particle concentration. Experiments will be conducted to study the coupling influence of heavy particulates within homogeneous turbulence to provide experimental validation currently unavailable in the literature that details the nature of the particle/fluid coupling within an unorganized turbulent flow. The experiments will be conducted under conditions that will allow direct comparison with previous numerical simulations and the conditions will be extended to those regimes currently inaccessible to computational solution. Results from this research will have impact upon many engineering fields which utilize two-phase dispersed systems such as spray combustion, particulate precipitators, spray drying, sediment transport, and cloud physics. The educational objective is to develop an integrated approach to engineering instruction that will provide connectivity to elements of design processes in conjunction with fundamental instruction. As an example of a commitment toward this goal, i t is proposed that a design component be added to the current undergraduate fluid and thermal sciences curriculum, to enhance the students' exposure to open-ended problem-solving and increase their understanding and interest in the topic through connection with relevant applications.

摘要CTS-9702723 Kenneth T.马里兰州基格大学 研究目标是通过详细的实验、分析和模拟，了解分散系统中质量、动量和能量是如何交换的，从而推进关于稀、分散、两相流中颗粒-湍流相互作用的知识状态。 将开发新的仪器，使颗粒浓度，颗粒速度和流体速度的三维体积内的同时测量。 扫描粒子图像测速仪将使用高速铜蒸气激光器，扫描光学器件，和一个鼓形相机来测量两个阶段的两个速度分量和测量体积内的多个平面上的颗粒浓度。 测量将提供有关湍流流体结构的颗粒组织的详细信息，其特征在于颗粒和流体速度和颗粒浓度的互相关。 将进行实验来研究均匀湍流中重颗粒的耦合影响，以提供目前文献中无法获得的实验验证，该文献详细描述了无组织湍流中颗粒/流体耦合的性质。 实验将进行的条件下，将允许直接比较与以前的数值模拟和条件将扩展到目前无法计算的解决方案的制度。 这项研究的结果将对许多利用两相分散系统的工程领域产生影响，如喷雾燃烧，颗粒沉淀器，喷雾干燥，沉积物输送和云物理。 教育目标是开发一种综合的方法来工程教学，将提供连接到设计过程中的基本指令结合元素。作为实现这一目标的承诺的一个例子，它的建议，设计组件被添加到目前的本科流体和热科学课程，以提高学生的接触到开放式的解决问题，并增加他们的理解和兴趣的主题，通过连接相关的应用。